Antenna device and method of adjusting said antenna device

Details Antenna device and method of adjusting said antenna device Antenna device and method of adjusting said antenna device

2005-02-01

2005-02-01

Phan, Tho (Department: 2821)

Communications: radio wave antennas

Antennas

With radio cabinet

Reexamination Certificate

active

06850198

ABSTRACT:
A dual-band antenna device for a portable radio communication device (2) comprises an inner (10) and an outer (20) generally planar radiating element portion. The inner portion is galvanically ungrounded and connectable to feed and the outer portion is connectable to ground. The element portions are essentially coplanar and separated by a gap (30;30′), wherein the outer element portion (20) surrounds the inner element portion (10). With this configuration desired antenna characteristics are obtainable in a controlled way. A portable radio communication device and a method for separate adjustment of the frequency bands are also provided.

REFERENCES:
patent: 5710987 (1998-01-01), Paulick
patent: 5926139 (1999-07-01), Korisch
patent: 6016126 (2000-01-01), Holshouser
patent: 6061024 (2000-05-01), McGirr et al.
patent: 6140966 (2000-10-01), Pankinaho
patent: 6366243 (2002-04-01), Isohatala et al.
patent: 1 003 240 (2000-05-01), None
patent: 1 067 627 (2001-01-01), None
Zi Dong Liu, Peter S. Hall and David Wake, Dual-Frequency Planar Inverted-F Antenna, Oct. 1997, vol. 45 No. 10, pp 1451-1458.

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